feat: add TV Quick Connect to connection page for Android TV / Apple TV

When user selects Android TV or Apple TV platform (from non-TV device),
shows 5-char code input + QR scanner to send subscription to TV via
Happ TV API. Hybrid QR strategy: native Telegram scanner on mobile,
html5-qrcode CDN fallback on desktop. i18n keys for ru/en/zh/fa.

Based on PR #415 by @smediainfo.

src/locales/en.json

@@ -593,6 +593,20 @@
       "label": "Traffic",
       "selectVolume": "Select traffic volume",
       "default": "Default: {{label}}"
+    },
+    "tvQuickConnect": {
+      "title": "Connect TV",
+      "description": "Enter the 5-character code from your TV screen",
+      "sendBtn": "Send to TV",
+      "badCode": "Enter a 5-character code (letters and digits)",
+      "sent": "Sent to TV!",
+      "error": "Failed to send to TV",
+      "scanTitle": "Scan QR Code",
+      "scanDescription": "Scan the QR code from your TV screen",
+      "scanBtn": "Scan QR from TV",
+      "stopScan": "Close camera",
+      "noCamera": "Camera access denied",
+      "codeFound": "Code found"
     }
   },
   "balance": {

src/locales/fa.json

@@ -472,6 +472,20 @@
       "resumeBtn": "ادامه",
       "title": "توقف اشتراک",
       "willBeCharged": "کسر خواهد شد"
+    },
+    "tvQuickConnect": {
+      "title": "اتصال تلویزیون",
+      "description": "کد ۵ رقمی نمایش داده شده روی صفحه تلویزیون را وارد کنید",
+      "sendBtn": "ارسال به تلویزیون",
+      "badCode": "کد ۵ رقمی وارد کنید (حروف و اعداد)",
+      "sent": "به تلویزیون ارسال شد!",
+      "error": "خطا در ارسال به تلویزیون",
+      "scanTitle": "اسکن کد QR",
+      "scanDescription": "کد QR روی صفحه تلویزیون را اسکن کنید",
+      "scanBtn": "اسکن QR از تلویزیون",
+      "stopScan": "بستن دوربین",
+      "noCamera": "دسترسی به دوربین امکان‌پذیر نیست",
+      "codeFound": "کد پیدا شد"
     }
   },
   "balance": {

src/locales/ru.json

@@ -621,6 +621,20 @@
       "label": "Трафик",
       "selectVolume": "Выбрать объём трафика",
       "default": "По умолчанию: {{label}}"
+    },
+    "tvQuickConnect": {
+      "title": "Подключить TV",
+      "description": "Введите 5-значный код с экрана телевизора",
+      "sendBtn": "Отправить на TV",
+      "badCode": "Введите 5-значный код (буквы и цифры)",
+      "sent": "Отправлено на TV!",
+      "error": "Ошибка отправки на TV",
+      "scanTitle": "Сканировать QR-код",
+      "scanDescription": "Отсканируйте QR-код с экрана телевизора",
+      "scanBtn": "Сканировать QR с TV",
+      "stopScan": "Закрыть камеру",
+      "noCamera": "Нет доступа к камере",
+      "codeFound": "Код найден"
     }
   },
   "balance": {

src/locales/zh.json

@@ -472,6 +472,20 @@
       "resumeBtn": "恢复",
       "title": "暂停订阅",
       "willBeCharged": "将扣费"
+    },
+    "tvQuickConnect": {
+      "title": "连接电视",
+      "description": "输入电视屏幕上显示的5位代码",
+      "sendBtn": "发送到电视",
+      "badCode": "请输入5位代码（字母和数字）",
+      "sent": "已发送到电视！",
+      "error": "发送到电视失败",
+      "scanTitle": "扫描二维码",
+      "scanDescription": "扫描电视屏幕上的二维码",
+      "scanBtn": "扫描电视二维码",
+      "stopScan": "关闭摄像头",
+      "noCamera": "无法访问摄像头",
+      "codeFound": "找到代码"
     }
   },
   "balance": {